Blackfin arch: Typo: "CONFIG_RTC_BFIN_MODULE" -> "CONFIG_RTC_DRV_BFIN_MODULE"

i'm *reasonably* confident that this is a typo that should be fixed.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/mach-bf533/boards/H8606.c

@@ -50,7 +50,7 @@
  */
 const char bfin_board_name[] = "HV Sistemas H8606";
 
-#if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_BFIN_MODULE)
+#if defined(CONFIG_RTC_DRV_BFIN) || defined(CONFIG_RTC_DRV_BFIN_MODULE)
 static struct platform_device rtc_device = {
 	.name = "rtc-bfin",
 	.id   = -1,